EQUILIBRIUM PHASE-BEHAVIOR OF POLY(ETHYLENE GLYCOL) PLUS POTASSIUM PHOSPHATE PLUS WATER 2-PHASE SYSTEMS AT VARIOUS PH AND TEMPERATURES

Authors
DASILVA LHM COIMBRA JSR MEIRELLES AJD
Citation
Lhm. Dasilva et al., EQUILIBRIUM PHASE-BEHAVIOR OF POLY(ETHYLENE GLYCOL) PLUS POTASSIUM PHOSPHATE PLUS WATER 2-PHASE SYSTEMS AT VARIOUS PH AND TEMPERATURES, Journal of chemical and engineering data, 42(2), 1997, pp. 398-401
Citations number
17
Categorie Soggetti
Engineering, Chemical",Chemistry
Journal title
Journal of chemical and engineering data → ACNP
ISSN journal
00219568
Volume
42
Issue
2
Year of publication
1997
Pages
398 - 401
Database
ISI
SICI code
0021-9568(1997)42:2<398:EPOPGP>2.0.ZU;2-I
Abstract
This work presents the effects of changes in temperature (4 degrees C, 25 degrees C, and 40 degrees C), pH (6, 7, and 9), and polymer molecu lar weight (1000 and 8000) on the equilibrium phase behavior of two-ph ase PEG + potassium phosphate + water systems. As the temperature and pH were increased, the binodal curve shifted to lower polyethylene and phosphate concentrations, resulting in a higher difference in polymer and salt concentrations between the top and bottom phases. This corre sponds to an increase in the region of two-phase coexistence.